# All files / middleware/validators widgetValidation.js

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     /**
     * Widget Validation Middleware
     *
     * Validates widget configuration data for creation and updates.
     * Ensures data integrity and security for widget operations.
     *
     * @module middleware/validators/widgetValidation
     */

    const { body, validationResult } = require('express-validator');
    const { logger } = require('../../config/logger');

    /**
     * Validation rules for creating a widget
     */
    const validateCreateWidget = [
      body('name')
        .trim()
        .notEmpty()
        .withMessage('Widget name is required')
        .isLength({ min: 3, max: 100 })
        .withMessage('Widget name must be between 3 and 100 characters'),

      body('whatsapp_number')
        .trim()
        .notEmpty()
        .withMessage('WhatsApp number is required')
        .matches(/^\+?[0-9]{8,15}$/)
        .withMessage('Invalid WhatsApp number format. Use international format (e.g., +5511999999999)'),

      body('button_title')
        .trim()
        .notEmpty()
        .withMessage('Button title is required')
        .isLength({ min: 1, max: 50 })
        .withMessage('Button title must be between 1 and 50 characters'),

      body('button_background_color')
        .optional()
        .trim()
        .matches(/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/)
        .withMessage('Invalid color format. Use hex format (e.g., #25D366)'),

      body('widget_title')
        .trim()
        .notEmpty()
        .withMessage('Widget title is required')
        .isLength({ min: 1, max: 100 })
        .withMessage('Widget title must be between 1 and 100 characters'),

      body('predefined_message')
        .optional()
        .trim()
        .isLength({ max: 1000 })
        .withMessage('Predefined message cannot exceed 1000 characters'),

      body('max_message_length')
        .optional()
        .isInt({ min: 50, max: 5000 })
        .withMessage('Max message length must be between 50 and 5000 characters'),

      body('margin_right')
        .optional()
        .isInt({ min: 0, max: 500 })
        .withMessage('Margin right must be between 0 and 500 pixels'),

      body('margin_bottom')
        .optional()
        .isInt({ min: 0, max: 500 })
        .withMessage('Margin bottom must be between 0 and 500 pixels'),

      body('border_radius')
        .optional()
        .isInt({ min: 0, max: 100 })
        .withMessage('Border radius must be between 0 and 100 pixels'),

      body('is_active')
        .optional()
        .isBoolean()
        .withMessage('is_active must be a boolean'),

      // Validation result handler
      (req, res, next) => {
        const errors = validationResult(req);

        if (!errors.isEmpty()) {
          logger.warn('Widget validation failed', {
            errors: errors.array(),
            userId: req.user?.id,
            tenantId: req.user?.tenantId
          });

          return res.status(400).json({
            success: false,
            error: 'Validation failed',
            details: errors.array().map(err => ({
              field: err.path,
              message: err.msg
            }))
          });
        }

        next();
      }
    ];

    /**
     * Validation rules for updating a widget
     */
    const validateUpdateWidget = [
      body('name')
        .optional()
        .trim()
        .isLength({ min: 3, max: 100 })
        .withMessage('Widget name must be between 3 and 100 characters'),

      body('whatsapp_number')
        .optional()
        .trim()
        .matches(/^\+?[0-9]{8,15}$/)
        .withMessage('Invalid WhatsApp number format. Use international format (e.g., +5511999999999)'),

      body('button_title')
        .optional()
        .trim()
        .isLength({ min: 1, max: 50 })
        .withMessage('Button title must be between 1 and 50 characters'),

      body('button_background_color')
        .optional()
        .trim()
        .matches(/^#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})$/)
        .withMessage('Invalid color format. Use hex format (e.g., #25D366)'),

      body('widget_title')
        .optional()
        .trim()
        .isLength({ min: 1, max: 100 })
        .withMessage('Widget title must be between 1 and 100 characters'),

      body('predefined_message')
        .optional()
        .trim()
        .isLength({ max: 1000 })
        .withMessage('Predefined message cannot exceed 1000 characters'),

      body('max_message_length')
        .optional()
        .isInt({ min: 50, max: 5000 })
        .withMessage('Max message length must be between 50 and 5000 characters'),

      body('margin_right')
        .optional()
        .isInt({ min: 0, max: 500 })
        .withMessage('Margin right must be between 0 and 500 pixels'),

      body('margin_bottom')
        .optional()
        .isInt({ min: 0, max: 500 })
        .withMessage('Margin bottom must be between 0 and 500 pixels'),

      body('border_radius')
        .optional()
        .isInt({ min: 0, max: 100 })
        .withMessage('Border radius must be between 0 and 100 pixels'),

      body('is_active')
        .optional()
        .isBoolean()
        .withMessage('is_active must be a boolean'),

      // Validation result handler
      (req, res, next) => {
        const errors = validationResult(req);

        if (!errors.isEmpty()) {
          logger.warn('Widget update validation failed', {
            errors: errors.array(),
            widgetId: req.params.id,
            userId: req.user?.id,
            tenantId: req.user?.tenantId
          });

          return res.status(400).json({
            success: false,
            error: 'Validation failed',
            details: errors.array().map(err => ({
              field: err.path,
              message: err.msg
            }))
          });
        }

        next();
      }
    ];

    /**
     * Validation rules for widget event tracking
     */
    const validateWidgetEvent = [
      body('event_type')
        .trim()
        .notEmpty()
        .withMessage('Event type is required')
        .isIn(['loaded', 'opened', 'closed', 'message_sent', 'clicked'])
        .withMessage('Invalid event type'),

      body('event_data')
        .optional()
        .isObject()
        .withMessage('Event data must be an object'),

      body('session_id')
        .optional()
        .trim()
        .isLength({ max: 64 })
        .withMessage('Session ID cannot exceed 64 characters'),

      // Validation result handler
      (req, res, next) => {
        const errors = validationResult(req);

        if (!errors.isEmpty()) {
          logger.warn('Widget event validation failed', {
            errors: errors.array(),
            widgetId: req.params.id
          });

          return res.status(400).json({
            success: false,
            error: 'Validation failed',
            details: errors.array().map(err => ({
              field: err.path,
              message: err.msg
            }))
          });
        }

        next();
      }
    ];

    module.exports = {
      validateCreateWidget,
      validateUpdateWidget,
      validateWidgetEvent
    };